DE3036937A1 - FILL BODIES FOR ANODE CONTAINERS TO BE INSERTED IN GALVANIC BATHS AND METHOD FOR PRODUCING THE FILL BODIES - Google Patents

Abstract

Anode bodies for a galvanic plating bath, e.g. for electrodeposition of copper, are spheres which can be received in an anode holder in the bath and have advantages over irregular and other anode shapes deriving from the fact that the metal is solubilized uniformly substantially over the entire surface area of the anode bodies and a uniform reproducible contact is made between them. The invention also comprehends a method of making such bodies by pressing cylindrical blanks, e.g. wire sections, to spherical shape, and a method of operating an electroplating bath which involves the use of such anode bodies.

Description

Applicant's HoIl & Ciβ \ aiuua.f

8500 Nuremberg 109

Title: Packing for ± n

setting anorexia
Manufacture of the packing

description

The invention relates to packing for ia gal ^ aaiseh® Baths to be used Äa © denbehält © r s © wl @ © ia V @ r £ ®ar © a for the production of the packing.

In galvanic high-performance plants a weräsa for ä ± ® cyanidic baths high purity Jtooä © nm © r, 7 eg made of copper, and for the acid bath alloyed fillers, eg made of copper alloyed with phosphorus. Often times when electroplating countries, circuit boards or aaderea slsk share auxiliary anodes in F © m by Titaßkorbtsaj; = di © used with d © a corresponding metal-filled Füllkörpera a ± nu _e ia the galvansiche Bad It is important @s "that these auxiliary anodes over its entire surface eiae gleich® filling have, so that a possible gl @ i © © h s Äfoschoidungsgewicht and equal © Äbsea © ideagsfläch © xfihr © ad full operation ensures isfco Mwr then accurate overlays lasseä reach _"t x-yas iasbesoader © in quality elektronisaten C © rlt®t®ilea impact vital isto around this coming, you have already granules of ElektKolyfc ^ Kupfar Since granules but quite irregularly prepared as filling material for Äaodeakörb © © always different Körperf © »© a aufw®isea ₇ both refilling d © r A & eäenkörfoe & X® Ameh DI® Beib © -

keeping the filling density significant difficulties. In addition, there are uneven contact areas between the granules and thus also different deposition areas. In practice, it is also known to cut pieces of a certain length from copper wires and to fill these cylindrical fillers into the anode baskets. These bulky packing elements also have in essentially have the aforementioned disadvantages. Above all, bridges often form at the filling opening and inside the basket. The well-known filling bodies for anode containers make it because of the uncontrollable loading It is necessary to shut down the galvanic system daily for a certain period of time. While During this filling phase, the operating temperature drops and so the system must then be put into operation be reheated. This results in operational downtimes lasting several hours.

The invention is therefore based on the object of filling bodies for anode containers and a process for their production to provide continuous, undisturbed charging and even. Achieve filling of the anode container.

To achieve this object, the packing elements according to the invention are characterized in that they have a spherical shape.

Spherical filling bodies have a surface that is uniformly curved on all sides, so that the contact surfaces also are always the same between the balls. The rolling ability of the balls enables undisturbed loading as well also an even filling of the anode container. Evenly layered spheres also result in the same deposition areas and essentially the same fill weight. Even if the balls are largely used up, they do not stick together Filling zones. The balls according to the invention therefore allow uninterrupted operation without downtime reach.

The ball diameter is advantageously designed so that the balls individually through the feed opening of the anode container roll and their diameter slightly smaller than the depth, but larger than half the depth of the anode container is. The most common ball diameters are therefore 5-30 mm, preferably 10-15 mm.

If the balls are so large that only one of them goes through the loading opening, then it can at all there are no closings. The balls in the specified sizes also only form a stacked layer. Optimal results are achieved when the balls of a filling of an anode container are the same size.

A preferred method for producing the same filling = body balls is characterized in that of one Prepare pieces of wire made of an anode material = · cut off certain length and then these cylinder pieces are pressed into a spherical shape.

The wire manufacturing can be done by Wals © u _f casting or pressing in the usual way. Depending on the intended use, it will consist of pure or alloyed metal. The wire diameter can be determined on a trial basis. Experience has shown that it is about 20% below that of the ball turner knife. The continuous cylinder pieces cut from the wire then pass between pressing tools, which continuously press and eject balls. With this simple and advantageous manufacturing process, "the balls can be manufactured fully automatically"

The drawing shows part of an anode container in Section with the packing according to the invention.

The filler balls 3 are filled in an anode basket 1 made of a titanium wire mesh 2. Since the diameter ä of the balls is slightly smaller than the depth t of the.

Basket, the balls are stacked in a single layer. Even if these balls move a bit or are shifted, the contact surface is always due to the evenly rounded surface of the balls same. Due to the spherical shape, the fillers are always seamless and without blocking, even when refilling classify and thus enable an even filling level.

If in the description only copper was mentioned as anode material, this does not mean that the spherical Packing bodies cannot also consist of other suitable electrolytic materials.

Claims (5)

PATENT ADVOCATE DIPL. INQ. LEONHARD HAIN Approved representative at the European Patent Office 'Plpl-Ing. Uontnrd Hain, P «lenHnw« ll, T «l 18, 8000 MOndicn 1 8000 MUNICH To the TAL 18 German Patent Office phone (ob9) £ 9 4/98 Zweibrückenstr. 12 teleqr. patentpienst 8000 Munich 2 TELEX 5S £ 873 HA1N D H / r Applicant: HoIl & Cie. GmbH, Gibitzenhofstrasse 86-8S, 8500 Nürnberg 109 Titelj Packing bodies for anode containers to be used in galvanic baths as well as methods for producing the packing bodies Patent claims 1. Packing for to be used in galvanic baths container, characterized in that this spherical shapeC 3) exhibit. 2. Filling body according to claim 1, characterized? that the diameter of the balls 5-30 mm, preferably 10 = 15 na amounts to. 3. Filling body according to claim 1 or 2, characterized in that "all balls of an anode container ~ filling have the same size. 4. Features Formwork according to one of claims 1 to 3, characterized ^ra ge that the ball diameter is smaller than the depth (t), but greater than half the depth (t) of the anode container (1). ORIGINAL INSPECTED Bank: Bayer. Vereinsbank Mündien bank code 70020270, account 821 3666 Hypo-Bank Möndien bank code 70020001, account 9803437370 Poilldietk Manchen BLZ 70010080, 15453-807 5. A method for the production of packing according to any one of claims 1 to 4, characterized in that of a wire consisting of an anode material cut pieces of a predetermined length and then these cylinder pieces pressed into a spherical shape.